CN1519838A - Magnetic disk drive device - Google Patents
Magnetic disk drive device Download PDFInfo
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- CN1519838A CN1519838A CNA2003101245652A CN200310124565A CN1519838A CN 1519838 A CN1519838 A CN 1519838A CN A2003101245652 A CNA2003101245652 A CN A2003101245652A CN 200310124565 A CN200310124565 A CN 200310124565A CN 1519838 A CN1519838 A CN 1519838A
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- engine
- disk drive
- voltage
- magnetic head
- magnetic disk
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
- G11B19/02—Control of operating function, e.g. switching from recording to reproducing
- G11B19/08—Control of operating function, e.g. switching from recording to reproducing by using devices external to the driving mechanisms, e.g. coin-freed switch
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B21/00—Head arrangements not specific to the method of recording or reproducing
- G11B21/02—Driving or moving of heads
- G11B21/12—Raising and lowering; Back-spacing or forward-spacing along track; Returning to starting position otherwise than during transducing operation
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B31/00—Arrangements for the associated working of recording or reproducing apparatus with related apparatus
Abstract
A disk drive device in which emergency unloading at the start of the engine is prevented, a head may have a prolonged life and improved reliability as an HDD is achieved. A disk drive device is driven or the movement of a magnetic head is allowed after an engine start in a vehicle is detected by an engine start detecting part, so that emergency unloading can be prevented at the start of the engine. In order to detect the engine start, voltage values on four power supply lines for a vehicle power supply device are monitored or the outputs of various sensors such as a tachometer, a vibration detection sensor, an engine sound detection sensor, a vehicle speed pulse, a gyro sensor and a parking brake are monitored. In another embodiment, the number of emergency unloading occurrence at the start of the engine is reduced, which allows the head to have a prolonged life, so that the disk drive device has improved reliability as an HDD. The voltage values on two power supply lines, first and second power supply lines for a vehicle power supply device are monitored. The magnetic head is allowed to move when the voltage values on the first and second power supply lines attain a prescribed value after a prescribed time period after the voltage value on the first power supply line attains prescribed value.
Description
The present invention relates to magnetic disk drive, be used for the activation bit recording disc, as disk.
As the External memory equipment of personal computer, hard disk drive (HDD) widespread use.Simultaneously, along with recording density increases, the price of HDD reduces, and today, some home electronicss have built-in HDD.HDD can store quite a large amount of videos and music content, and the various products with HDD are moving towards market.The hoot device that provides HDD is potential project.Auto-navigation system mainly uses DVD as memory device, and wishes to use in the future HDD.
The basic structure of HDD shows in Fig. 1.The HDD that shows is tilt to pack into the equipment of type, wherein is provided at the magnetic head 54 of gearing 54 ends, mechanically rises and floats from magnetic disk surface.
As shown in the figure, be attached to the magnetic head 51 on the gearing 54, on the radial direction of disk 53 (as shown by arrows) provide movably, and by voice coil motor (VCM) 160 location.Magnetic head 51 is pushed the surface of disk 57 by spring suspension 57.Simultaneously, the rotation of disk 53 is floated by the aerodynamic force that acts on the magnetic head 51, and the surface and the distance between the magnetic head 51 of disk 53 is controlled to be tens μ m.Under inactive state, magnetic head 51 is positioned at and withdraws from the position, and here, magnetic head 51 is placed on the conical part 56 on inclined-plane 55, and wherein inclined-plane 55 is formed on the end of box type frame 50.
Position between magnetic head 51 and the inclined-plane 55 is closed in the cut-open view that ties up to Fig. 2 and is shown.As shown in the figure, be positioned near inclined-plane 55, disk 53 neighborings, have conical part 56, on the disk radial direction, from disk 53 surfaces outwards, highly be tapered.From disk 53 read messages/to disk 53 write information the time (during driving), the position of magnetic head 51 location is apart from preset distance of first type surface of disk 53.Under inactive state (unloaded state), indicated as the arrow among the figure, magnetic head is placed on the conical part 56, recovers to withdraw from position, i.e. original position b, and standby.
The HDD that narrates above has the function that is called " emergency unload ".By the emergency unload function, force magnetic head 53 to move to and withdraw from the position, be i.e. the original position.Carry out emergency unload when supply voltage significantly reduces, damage in order to prevent magnetic head 53, wherein supply voltage is added on the spindle motor 52 and drives on the motor of magnetic head 51.Power supply is necessary to carry out this emergency unload function.Simultaneously, according to a known technology, when power supply all descends as mentioned above, anti-electric power, in other words, the non-load electric power that the rotation of the inertia of spindle motor 52 produces is used for executable operations.
When this technology is applied on the magnetic disk drive that is installed in engine-driven vehicle, when the cell voltage during engine start significantly descends, the emergency unload operation above carrying out during each engine start.
Fig. 3 has shown the example of power circuit in engine-driven vehicle.More particularly, alternator G is by engine driven, and wherein engine does not draw.AC power by alternator G provides by rectifier D rectification and shaping, and offers battery B.The cell voltage Vb of battery B offers the mobile terminals m of engine key switch SW.The engine key switch SW has fixed terminals ACC, ON and ST, and passes the cell voltage Vb of terminals ACC, offers low-power load, as stereo set, as the ACC power supply.Pass the cell voltage Vb of terminals ON, offer high power load HL, as motorized window, as the ON power supply.Pass the cell voltage Vb of terminals ST, offer starter motor, as MST voltage, and the rotation starter motor, come starting engine, wherein starter motor does not draw.Simultaneously, cell voltage Vb offers low-power load LL, as the backup battery by line BU.
Fig. 4 A and 4B are time control curves, have shown when starting engine, how the voltage on the power lead changes.Fig. 4 A has shown how backup battery voltage changes, and Fig. 4 B has shown how ACC voltage changes.Time control (I), (II), (III) that shows and the position of the switch that (IV) meets the engine key switch.In time control (I), engine key is in " ACC position ", and power supply offers low-power load, as stereo set.In time control (II), engine key is in " ON position ", and power supply offers high power load, as motorized window.In time control (III), engine key is in " ST position ", and power supply offers starter motor.In time control (IV), starter motor starts, and engine key returns to " ON position ".
In operation, when engine start, the decline of cell voltage can not only impel ACC voltage to descend, and can impel backup battery voltage to descend (time period from (III) to (IV) in Fig. 4).
Thus, if HDD is provided in engine-driven vehicle, when engine start, the decline that supply voltage is possible can impel above-mentioned emergency unload when each engine start.In the emergency unload operation, the anti-electric power of spindle motor is used to impel magnetic head to move.Thus, be used for the product of vehicle,, comparing, arriving at magnetic head 51 before the position of readiness b on inclined-planes 55 as the situation in the personal computer with the product of other type, magnetic head 51 more frequently with conical part 56 collisions on inclined-plane 55.More particularly, be used for the HDD of vehicle, inclined-plane 55 and magnetic head 51 must have higher permanance.In the magnetic disk drive with unsettled supply voltage operation, this is common shortcoming.
The objective of the invention is be used for the HDD of vehicle, be provided for the magnetic disk drive of vehicle, when engine start, allow to prevent emergency unload, and, have the flying head slide block of life-saving and the reliability that improves as HDD.
The present invention is directed to top environment, and another purpose of invention provides magnetic disk drive, allow to reduce the number of times of emergency unload, prolong the life-span of flying head slide block like this, and, realize the reliability that improves as HDD.
To achieve these goals, the magnetic disk drive according to first aspect present invention comprises information recording disk, and is driven by the supply voltage in the vehicle.Magnetic disk drive comprises the engine start detection part, is used to detect the startup of vehicle motor, and after the startup that detects vehicle motor, drives magnetic disk drive.
Like this, the emergency unload in the time of can preventing engine start, and the minimizing of emergency unload generation have reduced the collision between magnetic head and the inclined-plane.As a result, magnetic head can have the life-span of prolongation, and magnetic disk drive can be realized the reliability that improves as HDD.
Magnetic disk drive according to second aspect present invention comprises information recording disk, and by the vehicle power supply driven.Magnetic disk drive comprises: magnetic head is used for from disk read message/to the disk write information; The magnetic head driver part is used for giving magnetic head with driving command; The engine start detection part is used to detect the startup of vehicle motor; Move the permission parts with magnetic head, detect the startup of vehicle motor at the engine start detection part after, allow magnetic head to move by the magnetic head driver part.
Like this, behind engine start, HDD becomes can be accessed, the generation of emergency unload when preventing engine start thus.The minimizing that emergency unload takes place has reduced the number of times that collides between magnetic head and the inclined-plane, make magnetic head can have life-span of prolongation, and disc driver can be realized the reliability that improves as HDD.
According to the present invention first or the magnetic disk drive of second aspect in, according to the magnetic disk drive of third aspect present invention, further comprise and force moving-member, when the supply voltage in the vehicle interrupts, force magnetic head to move to and withdraw from the position.
According to the magnetic disk drive of fourth aspect present invention based on a third aspect of the present invention, and by providing anti-electric power to the magnetic head driver part, force magnetic head to move to and withdraw from the position, wherein anti-electric power is by the inertia rotation of spindle motor, and the activation record medium rotates and produces.Like this, if power interruption, magnetic head can turn back to definitely and withdraw from the position, makes the HDD that comprises magnetic head can critically prevent to damage.
According to the present invention first in the magnetic disk drive of fourth aspect, magnetic disk drive according to fifth aspect present invention, further comprise the magnitude of voltage monitoring circuit, when engine key is inserted, and when primary importance rotates to the second place, for first power lead that provides backup battery with provide the second source line of power supply, the monitor voltage value.Output valve according to the magnitude of voltage monitoring circuit, when the magnitude of voltage on the second source line reaches predetermined value, engine start detection part output engine start detection signal, value on first power lead then, or first value on power lead and the second source line become and be lower than predetermined value, be higher than predetermined value then.
Like this, can be by the startup of monitor voltage detection of engine, thus, after detection, HDD can start, and perhaps magnetic head allows to move.As a result, the emergency unload in the time of can preventing engine start, and the minimizing of emergency unload generation, reduced the collision frequency between magnetic head and the inclined-plane, make magnetic head can have life-span of prolongation, and magnetic disk drive can have the reliability of raising as HDD.
In first to the 4th any one the magnetic disk drive according to the present invention, magnetic disk drive according to sixth aspect present invention, further comprise the magnitude of voltage monitoring circuit, when engine key when the second place rotates to the 3rd position, for the 3rd power lead monitor voltage value that provides power supply; And according to the output valve of magnitude of voltage monitoring circuit, when engine key when the 3rd position rotates to the 4th position, for the 4th power lead monitor voltage value that provides power supply.When the magnitude of voltage on second source line or the 3rd power lead reaches predetermined value, engine start detection part output engine start detection signal, value on value on first power lead, or first power lead then and the second source line becomes and is lower than predetermined value, is higher than predetermined value then.
Like this, can pass through the startup of monitor voltage detection of engine, and after detection, HDD can start, perhaps magnetic head allows to move.As a result, can prevent the emergency unload when engine start, and the minimizing that takes place of emergency unload, reduce the collision between magnetic head and the inclined-plane, make magnetic head can have life-span of prolongation, and magnetic disk drive can have the reliability of raising as HDD.
According to the magnetic disk drive of seventh aspect present invention based on of the present invention first to the 4th any one, and when sensing the output of engine speed indicator, the output of engine start detection part has confirmed useful signal.
According to the magnetic disk drive of eighth aspect present invention based on of the present invention first to the 4th any one, and when sensing the vibration of the inside and outside engine of vehicle, the output of engine start detection part has confirmed useful signal.
According to the magnetic disk drive of ninth aspect present invention based on of the present invention first to the 4th any one, and when sensing the sound of engine, the output of engine start detection part has confirmed useful signal.
According to the magnetic disk drive of tenth aspect present invention based on of the present invention first to the 4th any one, and when according to the car speed pulse, when detecting vehicle ', the output of engine start detection part has confirmed useful signal.
According to the present invention the tenth on the one hand magnetic disk drive based on of the present invention first to the 4th any one, and when using gyrosensor, when detecting vehicle ', the output of engine start detection part has confirmed useful signal.
According to the present invention the magnetic disk drive of the 12 aspect based on of the present invention first to the 4th any one, and when sensing the position of parking brake (parking brake), the output of engine start detection part has confirmed useful signal.
According to the present invention the magnetic disk drive of the 13 aspect based on of the present invention first to the 4th any one, and in sensing vehicle during the operation of generator, the output of engine start detection part has confirmed useful signal.
According to the present invention the magnetic disk drive of the 14 aspect based on of the present invention first to the 4th any one, and when sensing starter motor and start, the output of engine start detection part has confirmed useful signal.
Like this can be, or, come the startup of detection of engine by detecting travelling of vehicle according to the output of each sensor, and HDD is started after confirming by detecting, or allow magnetic head to move the emergency unload when preventing engine start.As a result, the emergency unload in the time of can preventing engine start, and the minimizing of emergency unload generation have reduced the collision frequency between magnetic head and the inclined-plane.Thus, magnetic head can have the life-span of prolongation, and magnetic disk drive can be realized the reliability that improves as HDD.
According to the present invention the magnetic disk drive of the 15 aspect based on the of the present invention the tenth to the 14 any one, and the tail-off state before cartographic information, the backup in storer.In response to the detection of the power supply that offers the second source line, information is presented on the screen.Like this, when the driver waited for that HDD drives, map was shown, and thus, in wait, the driver can loosen from anxiety.
To achieve these goals, the magnetic disk drive of the 16 aspect according to the present invention is by the vehicle power supply driven in the vehicle.Magnetic disk drive comprises: counter, and according to prearranged signals about key switch in the vehicle, the beginning counting operation; And controller, when counter as calculated during first predetermined amount of time, be used to drive magnetic disk drive.
The magnetic disk drive of the 17 aspect according to the present invention is driven by the supply voltage in the vehicle.Magnetic disk drive further comprises: magnetic head is used for from the recording medium read message/to the recording medium write information, wherein recording medium is installed in the magnetic disk drive; The magnetic head driver part is used for giving magnetic head with driving command; Counter, according to prearranged signals about key switch in the vehicle, the beginning counting operation; Move the permission parts with magnetic head, when counter as calculated during first predetermined amount of time, allow magnetic head to move by the magnetic head driver part.
The magnetic disk drive of the tenth eight aspect is based on the of the present invention the 16 or the 17 aspect according to the present invention.Magnetic disk drive further comprises power supply unit, is used for supply voltage is offered each parts that magnetic disk drive and key switch in the vehicle interrelate.After the supply voltage of power supply unit offered magnetic disk drive by key switch, counter began counting operation.
The magnetic disk drive of the 19 aspect is based on the 16 to the tenth eight aspect of the present invention according to the present invention.Magnetic disk drive further comprises voltage monitoring circuit, is used to monitor the magnitude of voltage of power supply unit.Behind first predetermined amount of time, controller detects the magnitude of voltage result of voltage monitoring circuit, and when magnitude of voltage was lower than predetermined value, the control controller was counted once more, and when counter as calculated during second predetermined amount of time, the driving of control magnetic disk drive.
According to the present invention the magnetic disk drive of the 20 aspect based on the of the present invention the 16 to the 19 any one.Magnetic disk drive further comprises and forces moving-member, when the supply voltage in the vehicle interrupts, forces magnetic head to move to and withdraws from the position.
According to the present invention the 20 on the one hand magnetic disk drive based on the of the present invention the 16 to the 20 any one.By providing anti-electric power to the magnetic head driver part, to force moving-member to force magnetic head to move to and withdraw from the position, wherein anti-electric power is by the inertia rotation of spindle motor, and the activation record medium rotates and produces.
According to the present invention the magnetic disk drive of the 22 aspect based on the of the present invention the 16 to the 21 any one.Magnetic disk drive further comprises the engine start detection part, is used for detecting the startup of vehicle engine.Calculate in the operation of described first predetermined amount of time at counter, when the engine start detection part detected the startup of engine in the vehicle, controller control magnetic disk drive drove.
By said structure, for the vehicle that does not have voltage drop when the engine start, can monitor by using timer, come the startup of detection of engine.Simultaneously, for the vehicle with voltage drop, magnetic disk drive can start in time control more early.After putting detection time, magnetic head allows to move, and the emergency unload when making engine start minimizes, or is avoided.Thus, the generation of emergency unload can reduce, and this has reduced the collision frequency between magnetic head and the inclined-plane.Make magnetic head can have life-span of prolongation, and magnetic disk drive can have the reliability of raising as the HDD that is used for vehicle.
Fig. 1 is the basic structure planimetric map of inclination loading type HDD;
Fig. 2 cut-open view is used for the position relation between key diagram 1 inclined-plane and the magnetic head;
Fig. 3 is the calcspar of the power-supply system in the motor-powered vehicle;
Fig. 4 A and 4B are time control curves, are used for when engine start the change of supply voltage being described;
Fig. 5 is the calcspar of auto-navigation system, comprises according to HDD of the present invention;
Fig. 6 is the calcspar of HDD in the system of Fig. 5;
Fig. 7 A and 7B are time control curves, are used for the example of operation of the HDD engine start checkout equipment of key diagram 6;
Fig. 8 is a calcspar, has shown to comprise that embodiment of circuit, circuit are used to monitor the voltage of every power lead, and wherein power lead is connected on the key switch, and key switch appends among the embodiment of Fig. 6 demonstration;
Fig. 9 A is a time control curve to 9D, is used for the operation of key diagram 8 engine start checkout equipments;
Figure 10 is the synoptic diagram of the various sensor specific examples that show of Fig. 8;
Figure 11 is a time control curve, is used to illustrate the relation between the startup of the generation state of car speed pulse and HDD;
Figure 12 is a calcspar, has shown according to a further embodiment of the invention the HDD in the system that Fig. 5 shows;
Figure 13 A and 13B are time control curves, are used to illustrate the time control of using timer that HDD is started;
Figure 14 A and 14B are time control curves, are used for explanation and use timer in accordance with another embodiment of the present invention, the time control that HDD is started;
Figure 15 A and 15B are time control curves, are used to illustrate the timer of use according to another embodiment, the time control that HDD is started;
Figure 16 A and 16B are time control curves, are used to the timer that uses according to further embodiment is described, the time control that HDD is started;
Figure 17 is the calcspar of the embodiment that shows among Figure 12, has adjunct circuit, is used to monitor every the power lead that is connected on the IG switch; And
Figure 18 A is a time control curve to 18D, is used for illustrating the embodiment that shows according to Figure 17, the operation of engine start checkout equipment.
Fig. 5 is a calcspar, has shown the structure of auto-navigation system, provides according to magnetic disk drive of the present invention.Here, by explanation, use HDD rather than DVD map information part as auto-navigation system.Notice, the invention is not restricted to auto-navigation system, and be applied to provide in the automobile audio any equipment of HDD that auto navigation will be described as an embodiment.Magnetic disk drive according to the present invention comprises: as host CPU 11, ROM12, RAM13, timer LSI14, hard disk drive (HDD) 15, sensor 16, gps receiver 17, interface 18, input equipment 19, display 20, display controller 21, display-memory 22, speech treatment circuit 23, loudspeaker 24, the power circuit 25 that is used for vehicle, hard disk controller HDC26 and the backup RAM storer 27 of the critical piece of controlling.
According to the present invention, HDD15 provides to measure and prevents emergency unload, and disk is connected with system bus 10 by HDC26.HDC26 carries out the form control of disk, and wherein disk is installed on the HDD15, and HDC26 is also as main interface and HDD interface.Sensor 16 comprises the sensor groups that auto-navigation system is required, is used for travelling automatically, and for example, sensor comprises vehicle speed sensor and gyrosensor.Sensor 16 is connected with system bus 10 by interface 18.The output of gps receiver 17 offers interface 18, and provides mixed running control according to the result that GPS measures, and realizes travelling automatically.
Input equipment 19 is remote control equipment or the control desk that is used as GUI, is used for the information between input command or navigational system and the display 20.Speech treatment circuit 23 is as GUI, by sending speech guide, or receives input language sound, is used for and the navigational system communication.Speech guide is from loudspeaker 24 outputs.As mentioned above, the power circuit 25 that is used for vehicle comprises backup battery line (stabilized power source line) and ACC power lead.
Fig. 6 is the figure of HDD15, power circuit 25 and engine start checkout equipment 30 structures in the concrete displayed map 5, and wherein engine start checkout equipment 30 is used for the startup of detection of engine.As shown in the figure, the power lead 25 that is used for vehicle comprises two power leads, i.e. backup battery line 251 and ACC power lead 252.
HDD15 comprises: as innernal CPU 152, master interface circuit 151, the program storage 153 of critical piece, data-carrier store 154, HDD interface circuit 155, R/W (reading/writing, i.e. read/write) circuit 156, magnetic head Drive and Control Circuit 157, spindle motor control circuit 158, magnetic head 51, voice coil motor (VCM) 160 and spindle motor 161.
Above-mentioned master interface circuit 151, innernal CPU 152, program storage 153, data-carrier store 154, HDD interface circuit 155 are connected on the HDD system bus 150 jointly.
Engine start checkout equipment 30 comprises: magnitude of voltage monitoring circuit 301, threshold value are provided with circuit 302, engine start testing circuit 303 and sensor groups 304.The magnitude of voltage that magnitude of voltage monitoring circuit 301 monitors on backup battery line 251 and the ACC power lead 252, wherein voltage provides from above-mentioned two power supplys, and value is notified to engine start testing circuit 303.Be provided with in the circuit 304 in threshold value, the threshold value that detects temporary close is set up, and value is notified to engine start testing circuit 303.Engine start testing circuit 303 is provided with the circuit 302 from magnitude of voltage monitoring circuit 301 and threshold value and obtains voltage value data, and then according to the process of describing later, the engine start time control in response to detecting offers HDD with enabling signal.
Engine start testing circuit 303 is connected on the sensor groups 304 as selecting.In this case, the signal of detection trigger engine start time control must be accepted, and the inside programming mode determine it is necessary, and do not need above-mentioned magnitude of voltage supervisory work.Thus, the programmed logic of microcomputer or homologue is used for monitoring and control.In this case, except the sensor 16 that provides as the parts of auto-navigation system like this, as sensor groups 304, tachometer gage, vibration transducer, starter motor, generator and homologue are necessary.These will be specifically described.
Control start-up time according to HDD of the present invention is described now.According to present embodiment, the startup of detection of engine, make temporary close after, the startup of control HDD, and the emergency unload when preventing engine start.Parts as detection of engine starts will monitor the situation of the magnitude of voltage on backup battery line 251 and the ACC power lead 252 by declarative description.
Fig. 7 A and 7B are time control curves, use engine start checkout equipment 30, are used to the time control that illustrates that detection of engine starts.Fig. 7 A has shown the voltage waveform on the backup battery line 251, and Fig. 7 B has shown the voltage waveform on the ACC power lead 252.Threshold value SL is a scheduled voltage, is 9V according to present embodiment for example.This value is set, makes and impel the magnitude of voltage of vehicle temporary close to be lower than SL.
The driver inserts lock (LOCK) position with engine key, open lock, and screw key is to ACC position (I).Like this, the ACC power supply is elevated to for example 12V, and key rotates to ST position (III) from opening (ON) position (II) then, and this starts starter motor, and the voltage on backup battery line 251 and the ACC power lead 252 all raises.At the fixed time after the section, engine start (IV), and ACC power lead 252 and backup battery line 251 be elevated to raw voltage values 12V once more, and recover steady state (SS).Notice that the time period between the startup of ACC position, starter motor and the startup of engine is arbitrarily.Here,, only need detection of engine enable position (position IV), can give HDD with enabled instruction then in order to determine to avoid emergency unload.Thus, engine start testing circuit 303 monitors from magnitude of voltage monitoring circuit 301 whether the magnitude of voltage on the ACC power lead 252 surpasses the level of predetermined threshold SL.If surpass threshold value SL, engine key arrives the ACC position so, and whether monitor engine provides power supply then.More particularly, engine start testing circuit 303 monitors the magnitude of voltage on the backup battery line 251 from magnitude of voltage monitoring circuit 301.Monitor whether the magnitude of voltage on the backup battery line 251 is lower than predetermined threshold SL.Here, may monitor two power leads, promptly whether backup battery line 251 and ACC power lead 252 all are lower than predetermined threshold SL, and only to the supervision of ACC power lead 252, do not allow the startup of engine to detect with being determined.This is because engine key can turn back to the position of key LOCK from the ACC position.Thus, backup battery line 251 become be higher than predetermined threshold SL after, backup battery line 251 or two power leads, promptly backup battery line 251 and ACC power lead 252 must be monitored.
When the voltage on the power lead was lower than predetermined threshold SL, engine key arrived ST position (III) from ACC position (I) and ON position (II), and whether monitor engine starts.More particularly, engine start testing circuit 303 monitors from magnitude of voltage monitoring circuit 301 whether the magnitude of voltage on the backup battery line 251 surpasses predetermined threshold SL.If surpass predetermined threshold SL, then engine starts, and the command signal corresponding to engine start offers HDD15 thus.Notice in the detection of engine start, can monitor two power leads, promptly whether backup battery line 251 and ACC power lead 252 are higher than predetermined threshold SL.
HDD15 receives command signals at innernal CPU 152, and in response to the instruction of innernal CPU 152, magnetic head 51 is allowed to move.As mentioned above, according to present embodiment, can monitor two power leads, promptly the magnitude of voltage on backup battery line 251 and the ACC power lead 252 comes detection of engine startup definitely, and the magnetic head 51 of HDD15 is allowed to move then.
Thus, impel temporary close when engine start, emergency unload can be prevented from, and the collision between magnetic head 51 and the inclined-plane 55 can prevent engine start the time.Notice that in the above-described embodiments, magnetic head 51 is allowed to move behind the engine start, and before engine start, the power supply that is used for HDD can keep closing, and detect the startup of engine at above-mentioned parts after, HDD can open.Use is connected to the power lead on the key switch, and the method for coming detection of engine to start will be described.
Fig. 8 is the structural drawing among Fig. 6, the additional power lead that provides is provided is connected on the key switch 40.In Fig. 8, with the parts of those identical reference letter indications among Fig. 6, realize identical operations, no longer be described thus.
As shown in Figure 8, key switch 40 is connected with ACC power lead 252, power lead 253 and power lead 254 with backup battery line 251.When each comfortable LOCK position of engine key, ACC position and IG position, backup battery line 251, ACC power lead 252 and power lead 253 instructed voltage values.When engine start, power lead 254 instructed voltage values.
Fig. 9 A is a time control curve to 9D, is used for explanation by engine start checkout equipment 30, the time control that detection of engine starts.Fig. 9 A, 9B, 9C and 9D represent the voltage waveform on backup battery line 251, ACC power lead 252, IG power lead 253 and the ST power lead 254 separately.Threshold value SL is a scheduled voltage, is 9V according to present embodiment for example.The magnitude of voltage that is provided with when making the vehicle temporary close is lower than value SL like this.
The driver inserts lock (LOCK) position with engine key, open lock, and screw key is to ACC position (I).This impels the ACC power supply opening, and is elevated to for example 12V.Then, when key was opened to ON position (II), the IG power supply raise, and supply voltage is offered for example motorized window or homologue.Then, when key rotated to ST position (III), starter motor started, and the voltage on backup battery line 251 and the ACC power lead 252 all reduces, and the ST power supply raises.At the fixed time after the section, engine start (IV), and ACC power lead 252 and backup battery line 251 be elevated to raw voltage values, and the ST power supply reduces, and recover steady state (SS).Notice that the time period between the startup of ACC position, starter motor and the startup of engine is arbitrarily.Here,, only need detection of engine enable position (position IV), enabled instruction can be added on the HDD then in order to prevent emergency unload definitely.Thus, engine start testing circuit 303 monitors from magnitude of voltage monitoring circuit 301 whether the magnitude of voltage on ACC power lead 252 or the IG line 253 surpasses predetermined threshold SL.The value indication engine key that surpasses threshold value SL is in the ACC position or the IG position, and thus, whether monitor engine provides power supply then.More particularly, engine start testing circuit 303 monitor the magnitude of voltage on the backup battery line 251, and whether the magnitude of voltage on definite backup battery line 251 is lower than predetermined threshold SL from magnitude of voltage monitoring circuit 301.Here, can monitor two power leads, promptly whether backup battery line 251 and ACC power lead 252 all are lower than predetermined threshold SL, and only to the supervision of ACC power lead 252, do not allow the startup of detection of engine definitely.This is because engine key may turn back to the position of key LOCK from the ACC position.Thus, after backup battery line 251 surpasses predetermined threshold SL, must monitor backup battery line 251 or two power leads, i.e. backup battery line 251 and ACC power lead 252.
Can determine whether to provide the power initiation engine according to the magnitude of voltage on the ST power lead 254.More particularly, when just thinking to provide power supply to be used for starting engine, ST power lead 254 raises, thus, and monitor voltage value for this purpose.
When the value on the value on the backup battery line 251 or backup battery line 251 and the ACC power lead 252 was lower than predetermined threshold SL, engine key arrived ST position (III) from ACC position (I) and ON position (II).Whether monitor engine starts then.More particularly, engine start testing circuit 303 monitors the magnitude of voltage on the backup battery line 251 from magnitude of voltage monitoring circuit 301, and whether the magnitude of voltage on definite backup battery line 251 surpasses predetermined threshold SL.If magnitude of voltage surpasses threshold value SL, then engine starts, and thus the engine start instruction signal is offered HDD15.Can be by monitoring two power leads, promptly whether backup battery line 251 and ACC power lead 252 surpass predetermined threshold SL, come the startup of detection of engine.Alternatively, can monitor whether the value on the ST power lead 254 is lower than predetermined threshold SL.
HDD15 receives command signal at innernal CPU 152, and in response to the instruction of innernal CPU 152, magnetic head allows to move then.
As mentioned above, according to present embodiment, monitor four power leads, promptly the magnitude of voltage on backup battery line 251, ACC power lead 252, IG power lead 253 and the ST power lead 254 comes the startup of detection of engine definitely, and the magnetic head 51 of HDD15 is allowed to move then.
Thus, impel temporary close when engine start, the emergency unload of generation can be prevented from, and the collision between magnetic head 51 and the inclined-plane 55 can prevent engine start the time.Note, in the above embodiments, be used for behind engine start, magnetic head 51 is allowed to move, and before engine start, the magnetic head of HDD can keep closing, after the startup of engine, HDD can open then, and such control method is detected by above-mentioned parts.
The description of front relates to following detection, by using engine start checkout equipment 30, monitors any magnitude of voltage on four power leads 251 to 254, comes the startup of detection of engine.Simultaneously, as shown in figure 10, can be according to the output of any sensor 304A in back to 304C, the startup of detection of engine.
Output according to tachometer gage 304A detects
Engine start checkout equipment 30 is by engine start testing circuit 303, the rotation of monitor engine, and obtain the information of tachometer gage from unillustrated A/D change-over circuit.Then, if detect the continuous rotation of engine in the reasonable time section, then engine start checkout equipment 30 determines that engine starts.
Use engine sound detecting device 304B to respond to
Use engine sound detecting device 304B, detect the inside and outside engine sound of vehicle, in engine start testing circuit (microcomputer) 303, the sound that detects is subjected to frequency inverted, if and section is interior or longer at the fixed time, detect the frequency spectrum of representing engine rotation, then determine engine start.
Respond to according to vibration information
Use vibration transducer 304C to come induction vibration information.If section is interior or longer at the fixed time, detect the difference of the vibration information between inactive state of engine and the engine start state, then engine start testing circuit 303 (microcomputer) determines that engine starts.
Output according to generator detects
Engine start testing circuit 303 (microcomputer) obtains the information of whether operating about generator, and at the fixed time in the section or longer, determines the startup of engine according to operation.Corresponding to the engine start testing circuit 303 (microcomputer) of multi-power driven vehicle, obtain information about the starter motor startup, and the startup of detection of engine.
Notice that the description of front relates to the output of using various sensors, the startup of detection of engine makes HDD start then.Simultaneously, the time control after vehicle begins to move, HDD can start.In this case, the sensor 16 as the parts of auto-navigation system provide for example can be used to detect travelling of vehicle.According to a kind of method, can detect the vehicle velocity pulse.The generation state of car speed pulse and the time control that HDD is started are drawn in the time of Figure 11 control curve.
In Figure 11, in case engine key insert, be then process (I) to (IV), engine start, and vehicle begins to move (V), and produce the output signal P that is used for the car speed pulse.By the unillustrated testing circuit that travels, can detect pulse signal, and detect travelling of vehicle.According to detection signal, HDD is started.
Detect the another kind of method of vehicle running state, close the output and the homologue of (OFF) based on output, the Parking of gyrosensor.
As mentioned above, according to present embodiment, according to various signal of sensor, can detect travelling of vehicle definitely, the magnetic head 51 of HDD15 is allowed to move then, and wherein sensor can be used to detect transport condition.
As a result, impel temporary close when engine start, the emergency unload of generation can be prevented from, and the collision between magnetic head 51 and the inclined-plane 55 can prevent engine start the time.Notice that in the present embodiment, after vehicle began to move, magnetic head 51 allowed to move by above-mentioned parts, and before vehicle began to move, HDD can keep closing by above-mentioned parts, and after vehicle began to move, HDD can open by above-mentioned parts.
As in front, according to present embodiment, vehicle motor starts the back or vehicle begins to move back HDD startup, thus, and the emergency unload in the time of can avoiding engine start.Yet because when HDD started, map datum just was presented on the monitor screen, it is dangerous that the user can feel.Thus, in the navigational system according to present embodiment, the time period between ACC and ON state is stored among the backup RAM27 to starting engine, and the map of indication engine vehicle location when stopping last time, is preferably shown.Except navigational system, in conjunction with the HDD that is used for the music information transcriber of vehicle, specify engine to interrupt the information (as index information) of the preceding music information of carrying out, shown that preferably wherein information stores is in backup RAM27.
As mentioned above,, be used for the HDD of vehicle according to the present invention, detect the startup of engine after, or after vehicle began to travel, HDD started or magnetic head is driven.Thus, the emergency unload in the time of can preventing engine start.The minimizing that emergency unload takes place can reduce the collision frequency between magnetic head and the inclined-plane, and the magnetic disk drive that is used in vehicle has the magnetic head of life-saving, and as HDD, can provide the reliability of raising.
According to a first aspect of the invention, detect the startup of vehicle motor at the engine start detection part after, magnetic disk drive is driven, the emergency unload in the time of can avoiding engine start thus.As a result, the minimizing that emergency unload takes place can reduce the collision frequency between magnetic head and the inclined-plane, make magnetic head have life-span of prolongation, and magnetic disk drive can have the reliability of raising as HDD.
According to a second aspect of the invention, detect the startup of vehicle motor at the engine start detection part after, allow magnetic head driver part moving head.Thus, can visit HDD behind the engine start, the emergency unload in the time of can preventing engine start, and the minimizing of emergency unload generation can reduce the collision frequency between magnetic head and the inclined-plane.As a result, magnetic head can have the life-span of prolongation, and magnetic disk drive can have the reliability of raising as HDD.
According to the of the present invention the 3rd and four aspects, if power interruption, magnetic head can return reliably and withdraw from the position, comprises the HDD of magnetic head thus, can critically prevent to damage.
According to the of the present invention the 5th and six aspects, can pass through monitor voltage, the startup of detection of engine, and after detecting, HDD starts or magnetic head allows to move.Thus, the emergency unload in the time of can preventing engine start, and the minimizing of emergency unload generation can reduce the collision frequency between magnetic head and the inclined-plane.As a result, magnetic head can have the life-span of prolongation, and magnetic disk drive can have the reliability of raising as HDD.
According to the 7th to 14 aspect of the present invention, can be according to the output of various sensors, or, come the startup of detection of engine by detecting travelling of vehicle.After detection, HDD starts or magnetic head allows to move, and the emergency unload in the time of can preventing engine start, and the minimizing of emergency unload generation can reduce the collision frequency between magnetic head and the inclined-plane.As a result, magnetic head can have the life-span of prolongation, and magnetic disk drive can have the reliability of raising as HDD.
According to a fifteenth aspect of the invention, the cartographic information before the tail-off state, backup is in storer, and cartographic information is presented on the screen.Like this, when the driver waited for that HDD drives, cartographic information was shown, and thus, in wait, the driver can loosen from anxiety.
Figure 12 is the figure of magnetic disk drive in accordance with another embodiment of the present invention, and HDD15 and vehicle power supply circuit 25 among Fig. 5 have specifically been shown, with the structure of engine start checkout equipment 30, wherein engine start checkout equipment 30 and Fig. 6 homologue are used for the startup of detection of engine.
According to present embodiment, a timer LSI14 is arranged, by host CPU 11, the time counting value is set, and allows interrupt procedure to take processing in programmable mode.Here, behind the engine start, specify the time control that HDD is started.
Specifically describe the time control that HDD is started according to the present invention now.According to present embodiment, when engine start, behind timer counting predetermined amount of time, HDD starts, and the number of times that emergency unload is taken place reduces.
Figure 13 A and 13B are time control curves, are used to illustrate the time control by using timer that HDD is started.Figure 13 A has shown the voltage waveform on the backup battery line 251, and Figure 13 B has shown the voltage waveform on the ACC power lead 252.SL (threshold value) represents scheduled voltage, is 9V according to present embodiment for example.This voltage is set, makes the magnitude of voltage of vehicle temporary close be lower than magnitude of voltage SL.
The driver inserts the LOCK position with engine key, opens lock, and screw key is to ACC position (I).Like this, the ACC power supply is elevated to for example 12V, and key rotates to ST position (III) from ON position (II) then, and this starts starter motor, and the voltage on backup battery line 251 and the ACC power lead 252 all raises.After the section, engine start (IV), and the voltage on ACC power lead 252 and the backup battery line 251 are elevated to raw voltage values 12V once more at the fixed time, and recover steady state (SS).Notice that the time period between the startup of ACC position, starter motor and the startup of engine is arbitrarily.
The driver inserts lock (LOCK) position with engine key, open lock, and screw key is to the ACC position.Like this, the ACC power supply raises.Then, timer LSI14 begins counting.By engine key is rotated to the ST position from the ON position, starter motor is started, and the voltage on ACC power lead 252 and the backup battery line 251 all reduce.Behind starter motor rotation predetermined amount of time, ACC power lead 252 is that backup battery line 251 raises then, and recovers steady state (SS).Time period between the startup of ACC and ON position, starter motor and the startup of engine is arbitrarily.
According to present embodiment, timer LSI14 is programmed, calculated five seconds, and begin counting from the ACC position, and after five seconds, the instruction that allows magnetic head 51 to move sends to HDD15 from host CPU 11.More particularly, according to present embodiment, because the voltage drop part A may be not less than predetermined threshold SL, so use timer, the number of times of emergency unload generation can minimize like this.
HDD15 receives command signal at innernal CPU 152, and in response to the instruction of innernal CPU 152, magnetic head 51 is allowed to move then.
Notice that in the above-described embodiments, after timer began to calculate predetermined amount of time, magnetic head 51 was allowed to move, and before engine start, HDD can keep closing, and when above-mentioned parts detect the startup of engine, open.
Figure 14 A and 14B are time control curves, are used to illustrate the time control by using timer that HDD is started.In Figure 14 A and 14B, with the parts of Figure 13 A and those identical reference letter indications of 13B, carry out identical operations, be not described thus.
Here, after five seconds, monitor the magnitude of voltage on backup battery line 251 and the ACC power lead 252, if value is lower than threshold value SL, then timer restarts, and HDD is started.
Like this, if be not activated, HDD15 is started in five seconds rear engines that are provided with.Thus, engine can expend some times and starts.This operation can be repeated several times.
Figure 15 A, 15B, 16A and 16B have shown embodiment, according to this embodiment, have used timer, and the supply voltage value in the monitoring vehicle, and when reaching predetermined condition, HDD are started.
According to the embodiment of Figure 15 A and 15B demonstration, the magnitude of voltage on backup battery line 251 and the ACC power lead 252 all is monitored.The driver inserts lock (LOCK) position with engine key, opens lock.When key rotates to the ACC position (time control I), the ACC power supply raises.Then, magnitude of voltage monitoring circuit 301 beginning monitor voltage values, and timer LSI14 begins counting.
Then, when engine key rotates to ST position (III), when starter motor was started, by above-mentioned voltage drop state, the magnitude of voltage on backup battery line 251 and the ACC power lead 252 all raise.When magnitude of voltage was lower than intended threshold level SL, magnitude of voltage monitoring circuit 301 can detect, and the voltage that it monitors is lower than intended threshold level SL.Like this, during time period from (III) to (IV), the magnitude of voltage on backup battery line 251 and ACC power lead 252 is when being lower than intended threshold level SL, these magnitudes of voltage are in case surpass the time point of threshold level SL once more and be detected, and startup that can detection of engine.At this moment, in engine start time control (IV), HDD is started.Thus, in this case,, be not performed by using the startup of the HDD that timer monitors.
Simultaneously, in the time period from (III) to (IV), the magnitude of voltage on backup battery line 251 and the ACC power lead 252 can be not less than because the predetermined threshold voltage levels SL (being represented by dot-and-dash line) of voltage drop.In this case, can not be by the monitor voltage value, the startup of detection of engine, thus, the timer that uses Figure 13 A and 13B to show starts HDD.
When detecting the startup of engine, or after timer calculated five seconds, the instruction that allows magnetic head 51 to move, CPU11 sends to HDD15 internally.
As mentioned above, according to present embodiment,, change the time control that HDD is started according to the voltage level of temporary close.If the magnitude of voltage of temporary close is higher than threshold level (as the magnitude of voltage among Figure 13 A), (time control IV) starts HDD when according to the startup of magnitude of voltage detection of engine.Simultaneously, if the magnitude of voltage of temporary close is lower than intended threshold level SL, after timer LSI14 calculates predetermined amount of time, HDD is started.Like this, moving of control head 51 prevents emergency unload.
In the embodiment of Figure 16 A and 16B demonstration, in timer LSI14 starts back five seconds predetermined amount of time, when the engine in the vehicle also is not activated, in other words, if the magnitude of voltage on backup battery line 251 or the ACC power lead 252 still is lower than threshold value SL, timer restarts.Then, behind another predetermined amount of time of three seconds, HDD is started.Moving of control head prevents emergency unload like this.
To describe an embodiment, and according to this embodiment, use the power lead that is connected on the key switch, the method and the use timer that come detection of engine to start come the method for detection of engine startup all to be used, and HDD is started.
Except the difference of adding power lead, wherein power lead is connected on the key switch 40, and Figure 17 is identical with Figure 12.In Figure 17, with the parts of those identical reference letter indications among Figure 12, carry out identical operations, get in touch present embodiment thus, will no longer describe.
As shown in figure 17, key switch 40 is connected with backup battery line 251, ACC power lead 252, power lead 253 and ST power lead 254.When each comfortable LOCK position of engine key, ACC position and IG position, backup battery line 251, ACC power lead 252, power lead 253 pilot cell magnitudes of voltage.When engine start, ST power lead 254 pilot cell magnitudes of voltage.
Figure 18 A is a time control curve to 18D, is used to illustrate embodiment, according to this embodiment, by both using timer to monitor and using the magnitude of voltage that is connected to the power lead on the key switch to monitor, HDD is started.Figure 18 A, 18B, 18C and 18D show the magnitude of voltage on backup battery line 251, ACC power lead 252, IG power lead 253 and the ST power lead 254 separately.SL (threshold value) represents scheduled voltage, is 9V according to present embodiment for example.
The driver inserts the LOCK position with engine key, opens lock, and screw key is to ACC position (I).Like this, the ACC power supply is elevated to for example 12V.At this moment, timer LSI14 begins counting.
Then, when engine key rotated to ON position (II), the IG power supply raise, and supply voltage offers for example motorized window.Notice that at time point (II), timer LSI14 can begin counting.When key switch rotated to position (III), starter motor started, because temporary close, the voltage on backup battery line 251 and the ACC power lead 252 all reduces, and the voltage on the ST power lead raises.At this moment, be lower than threshold level SL according to monitor voltage, magnitude of voltage monitoring circuit 301 detects temporary close.At the fixed time after the section, engine start (IV), and the magnitude of voltage on backup battery line 251 and the ACC power lead 252 is elevated to original level, and the ST power supply reduces, and recovers steady state (SS).Can detect the magnitude of voltage of steady state (SS), come the startup of detection of engine, thus, on time point, the instruction that allows magnetic head 51 to move sends to HDD15 from host CPU 11.
Simultaneously, in the time period from (III) to (IV), the magnitude of voltage on backup battery line 251 and the ACC power lead 252 can not be lower than because the intended threshold level SL (representing with dot-and-dash line) of temporary close.In this case, can not detect the engine start in the vehicle by monitoring supply voltage value, the timer that uses Figure 13 A and 13B to show thus starts HDD.
When detecting the startup of engine, or when timer as calculated five seconds the time, the instruction that allows magnetic head 51 to move sends to HDD15 from host CPU 11.
Can determine whether to provide supply voltage according to the magnitude of voltage on the ST power lead 254, be used for starting engine.More particularly, owing to just think to provide supply voltage, when coming starting engine, ST power lead 254 raises, can the monitor voltage value and be used to determine.If the magnitude of voltage on the ST power lead 254 is higher than intended threshold level SL, becoming then is lower than value SL, and startup that then can detection of engine thus, makes HDD start afterwards.Simultaneously, if the magnitude of voltage on the ST power lead 254 is not higher than intended threshold level SL, then after timer has calculated five seconds, HDD is started.
Then, when the startup of detection of engine, or after timer had calculated five seconds, the instruction that allows magnetic head 51 to move sent to HDD15 from host CPU 11.
As the front,, monitor four power leads according to present embodiment, it is the magnitude of voltage on backup battery line 251, ACC power lead 252, IG power lead 253 and the ST power lead 254, come the startup of detection of engine definitely, and after detection, allow the magnetic head 51 of HDD15 to move.Alternatively, use timer LSI14, additionally the execution time monitors.When satisfying a kind of condition of method for monitoring, the instruction that allows magnetic head 51 to move sends to HDD15 from host CPU 11.
Thus, when engine start, can be avoided, and can be prevented when engine start, the collision between magnetic head 51 and the inclined-plane 55 by the emergency unload that temporary close impels.Notice that in the above embodiments, behind engine start, magnetic head 51 allows to move, and before engine start, HDD can keep closing, and detect the startup of engine at above-mentioned parts after, can open.
As the front, according to present embodiment, behind the engine start in vehicle, HDD starts, the emergency unload in the time of can preventing engine start definitely thus.Yet, because for example in navigational system, before HDD started, map datum was not presented at and monitors that it is dangerous that the user can feel on the screen.Thus, the time period between the startup of ACC and ON state and engine, be stored among the backup RAM, and indicate the map of vehicle location when last time, engine stopped, preferably being shown.Except navigational system, in the HDD of combining music information reproduction apparatus, specify engine to interrupt the information (for example index information) of the preceding music information of carrying out, preferably be shown.Wherein music information has been stored among the backup RAM27.
As mentioned above,, in the magnetic disk drive that the supply voltage in using vehicle drives, even do not have the vehicle of voltage drop during for engine start, monitor, can determine the startup of engine by timer according to present embodiment.Simultaneously, for the vehicle with voltage drop, the time control early can start magnetic disk drive.By moving the emergency unload in the time of to prevent engine start at some back permission detection time magnetic head.Thus, the number of times of emergency unload can reduce, and the collision frequency between magnetic head and the inclined-plane reduces.As a result, magnetic head can have the life-span of prolongation, and magnetic disk drive can have the reliability of raising as HDD.
Claims (7)
1. magnetic disk drive is driven by the supply voltage in the vehicle, comprising:
Counter, according to prearranged signals about key switch in the described vehicle, the beginning counting operation; With
Controller, when described counter as calculated during first predetermined amount of time, drive described magnetic disk drive.
2. magnetic disk drive is driven by the supply voltage in the vehicle, comprising:
Magnetic head is used for from the recording medium read message/to the recording medium write information, wherein recording medium is installed on the described magnetic disk drive;
The magnetic head driver part is used for giving described magnetic head with driving command;
Counter, according to prearranged signals about key switch in the described vehicle, the beginning counting operation; With
Magnetic head moves the permission parts, when described counter as calculated during first predetermined amount of time, allow described magnetic head to move by described magnetic head driver part.
3. according to the magnetic disk drive of claim 1 or 2, further comprise power supply unit, be used for power supply is offered each parts of described magnetic disk drive, wherein said magnetic disk drive is connected with key switch in the described vehicle,
At the supply voltage of described power supply unit by key switch, offer described magnetic disk drive after, described counter begins counting operation.
4. according to the magnetic disk drive of claim 1 or 2, further comprise the magnitude of voltage monitoring circuit, be used to monitor the magnitude of voltage of described power supply unit; With
Controller behind described first predetermined amount of time, detects the magnitude of voltage result of described voltage monitoring circuit, when described magnitude of voltage is lower than predetermined value, control described controller and count once more, and when described counter as calculated during second predetermined amount of time, drive described magnetic disk drive.
5. according to the magnetic disk drive of claim 1 or 2, further comprise and force moving-member, when the supply voltage in the described vehicle interrupts, force described magnetic head to move to and withdraw from the position.
6. according to the magnetic disk drive of claim 5,
By providing anti-electric power to described magnetic head driver part, describedly to force moving-member to force described magnetic head to move to withdraw from the position, wherein anti-electric power is by the inertia rotation of spindle motor, drives described recording medium rotation and produces.
7. according to the magnetic disk drive of claim 1 or 2, further comprise the engine start detection part, detect the startup of engine in the vehicle,
Calculate in the operation of described first predetermined amount of time at described counter, when described engine start detection part detected the startup of engine in the vehicle, described magnetic disk drive was driven.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000123265A JP3830725B2 (en) | 2000-04-24 | 2000-04-24 | Drive control system for in-vehicle hard disk drive |
| JP123264/2000 | 2000-04-24 | ||
| JP123265/2000 | 2000-04-24 | ||
| JP2000123264A JP3835790B2 (en) | 2000-04-24 | 2000-04-24 | Drive control system for in-vehicle hard disk drive |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN01120764.7A Division CN1334565A (en) | 2000-04-24 | 2001-04-24 | Disk drive device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1519838A true CN1519838A (en) | 2004-08-11 |
Family
ID=26590689
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN01120764.7A Pending CN1334565A (en) | 2000-04-24 | 2001-04-24 | Disk drive device |
| CNA2003101245652A Pending CN1519838A (en) | 2000-04-24 | 2001-04-24 | Magnetic disk drive device |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN01120764.7A Pending CN1334565A (en) | 2000-04-24 | 2001-04-24 | Disk drive device |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US6937417B2 (en) |
| EP (1) | EP1152424A3 (en) |
| CN (2) | CN1334565A (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3692086B2 (en) | 2002-03-12 | 2005-09-07 | 株式会社東芝 | Driving method of spindle motor in disk storage device |
| JP2003317366A (en) * | 2002-04-17 | 2003-11-07 | Hitachi Ltd | Control apparatus and control method for information recording and reproducing device |
| JP2005242717A (en) * | 2004-02-26 | 2005-09-08 | Toshiba Corp | Storage device, method, and system |
| JP2005346741A (en) * | 2004-05-31 | 2005-12-15 | Toshiba Corp | Disk storage device and emergency head retraction control circuit applied to the device |
| JP2006269006A (en) * | 2005-03-25 | 2006-10-05 | Fujitsu Ltd | Storage device, control method and program |
| US7913108B1 (en) * | 2006-03-28 | 2011-03-22 | Emc Corporation | System and method for improving disk drive performance during high frequency vibration conditions |
| US8271140B2 (en) | 2006-08-25 | 2012-09-18 | International Business Machines Corporation | Periodic rotational vibration check for storage devices to compensate for varying loads |
| JP7400404B2 (en) * | 2019-11-28 | 2023-12-19 | 株式会社レゾナック | Recording/playback device |
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| JPS5949350A (en) * | 1982-09-13 | 1984-03-21 | Nippon Denso Co Ltd | Contents protection method for backup memory of car controlling computer |
| JPH0613290B2 (en) * | 1983-07-08 | 1994-02-23 | 日産自動車株式会社 | Self-diagnosis circuit for vehicle controller |
| US4701902A (en) * | 1984-04-27 | 1987-10-20 | Pioneer Electronic Corporation | Automatic loading disc player |
| NL8402497A (en) * | 1984-08-14 | 1986-03-03 | Philips Nv | VEHICLE NAVIGATION SYSTEM EQUIPPED WITH AN ADAPTIVE INSURANCE NAVIGATION SYSTEM BASED ON MEASUREMENT OF THE SPEED AND CROSS-GEAR ACCELERATION OF THE VEHICLE AND PROVIDED WITH A CORRECTION UNIT FOR CORRECTING THE MEASURED VALUES. |
| DE3534574C3 (en) * | 1984-09-29 | 1998-05-20 | Pioneer Electronic Corp | Information display device in a motor vehicle |
| DE3631994A1 (en) * | 1986-09-20 | 1988-03-31 | Mannesmann Kienzle Gmbh | DEVICE FOR A VEHICLE INFORMATION DEVICE |
| US4786995A (en) * | 1986-11-06 | 1988-11-22 | Peripheral Technology, Inc | Automatic head retract system for disk drive |
| DE3828858A1 (en) * | 1987-09-29 | 1989-04-06 | Pioneer Electronic Corp | NAVIGATION DEVICE FOR A MOTOR VEHICLE |
| JPH03135853A (en) * | 1989-10-20 | 1991-06-10 | Hitachi Ltd | Control device and method for automobile |
| JPH05157573A (en) * | 1991-12-03 | 1993-06-22 | Daihatsu Motor Co Ltd | Image displaying of navigation system |
| US5550738A (en) * | 1994-08-19 | 1996-08-27 | Teamnet, Inc. | System for recording and analyzing vehicle trip data |
| US5794164A (en) * | 1995-11-29 | 1998-08-11 | Microsoft Corporation | Vehicle computer system |
| JP3043274B2 (en) * | 1996-04-23 | 2000-05-22 | 株式会社ハーネス総合技術研究所 | In-vehicle electronic control unit |
| US5889629A (en) * | 1996-06-27 | 1999-03-30 | Western Digital Corporation | Method and apparatus for controlling disk drive head parking during power interruption |
| US6434459B2 (en) * | 1996-12-16 | 2002-08-13 | Microsoft Corporation | Automobile information system |
| JPH11353783A (en) * | 1998-06-02 | 1999-12-24 | Pioneer Electron Corp | Disk recording and reproducing device |
| JP2000293923A (en) * | 1999-04-08 | 2000-10-20 | Denso Corp | Power supply device for information processor, and information processor |
| JP2001213243A (en) * | 2000-01-31 | 2001-08-07 | Pioneer Electronic Corp | On-vehicle information processor |
| JP2001236717A (en) * | 2000-02-18 | 2001-08-31 | Pioneer Electronic Corp | Information recording and reproducing device |
| US6633448B1 (en) * | 2000-09-06 | 2003-10-14 | International Business Machines Corporation | Disk data storage device having improved tolerance for stressful environments |
| US6546456B1 (en) * | 2000-09-08 | 2003-04-08 | International Business Machines Corporation | Method and apparatus for operating vehicle mounted disk drive storage device |
-
2001
- 2001-04-20 EP EP01109778A patent/EP1152424A3/en not_active Withdrawn
- 2001-04-23 US US09/839,538 patent/US6937417B2/en not_active Expired - Fee Related
- 2001-04-24 CN CN01120764.7A patent/CN1334565A/en active Pending
- 2001-04-24 CN CNA2003101245652A patent/CN1519838A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| US6937417B2 (en) | 2005-08-30 |
| US20020021512A1 (en) | 2002-02-21 |
| EP1152424A3 (en) | 2003-07-30 |
| CN1334565A (en) | 2002-02-06 |
| EP1152424A2 (en) | 2001-11-07 |
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